re: Thinkful, we have a rigorous, full-time program that matches your definition of "online classroom" as well as a flexible program for those who can only commit part-time. Both offer 1-on-1 mentorship, with stats available on CIRR.org.
OP - you're welcome to ping me (bhaumik@thinkful[dot]com) w/ any specific questions. I run the full-time product.
OP - you're welcome to ping me (bhaumik@thinkful[dot]com) w/ any specific questions. I run the full-time product.